Protiva, Coli. Czech. Chem. Co”., 24, 3955 (1959). in satisfactory yields. This procedure was preferred to that in the literature requiring hydriodic acid and was in fact the only method available for the reduction of 3, 4-dime thoxybenzalphthalide. The cyclodehydrations of the 2- (phenethy1) benzoic acid were effected in good yields by heating in a polyphosphoric acid medium. Bromination followed by dehydrobromination gave the desired dibenzo [ale]-[1, 3 ...